The Collaborative International Dictionary of English v.0.48:

bollocks \bollocks\ v.
   to make a mess of.

   Syn: botch, fumble, botch up, muff, blow it, flub, screw up,
        ball up, blunder, spoil, muck up, bungle, fluff, bollix,
        bollix up, bollocks up, bobble, mishandle, louse up,
        foul up, mess up, fuck up.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

bollocks
    v 1: make a mess of, destroy or ruin; "I botched the dinner and
         we had to eat out"; "the pianist screwed up the difficult
         passage in the second movement" [syn: botch, bodge,
         bumble, fumble, botch up, muff, blow, flub,
         screw up, ball up, spoil, muck up, bungle,
         fluff, bollix, bollix up, bollocks, bollocks up,
         bobble, mishandle, louse up, foul up, mess up,
         fuck up]